Home / 657,917.10-986,875.65-421,721.10

Finding the Fourth Proportional to 657,917.10, 986,875.65 and 421,721.10

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Solution

The fourth proportional to 657,917.10, 986,875.65 and 421,721.10 is: 632,581.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,917.10 : 986,875.65 = 421,721.10 : x
  2. Step 2: Convert to fraction form
    657,917.10/986,875.65 = 421,721.10/x
  3. Step 3: Cross multiply
    657,917.10x = 986,875.65 × 421,721.10
  4. Step 4: Simplify right side
    657,917.10x = 416,186,284,681.22
  5. Step 5: Solve for x
    x = 416,186,284,681.22/657,917.10
  6. Step 6: Final answer
    x = 632,581.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.