Home / 913,960,945.80-1,261,302,269.40-512,078,161.32

Finding the Fourth Proportional to 913,960,945.80, 1,261,302,269.40 and 512,078,161.32

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Solution

The fourth proportional to 913,960,945.80, 1,261,302,269.40 and 512,078,161.32 is: 706,688,124.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,960,945.80 : 1,261,302,269.40 = 512,078,161.32 : x
  2. Step 2: Convert to fraction form
    913,960,945.80/1,261,302,269.40 = 512,078,161.32/x
  3. Step 3: Cross multiply
    913,960,945.80x = 1,261,302,269.40 × 512,078,161.32
  4. Step 4: Simplify right side
    913,960,945.80x = 645,885,346,983,095,296
  5. Step 5: Solve for x
    x = 645,885,346,983,095,296/913,960,945.80
  6. Step 6: Final answer
    x = 706,688,124.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.