Home / 1,312,139.40-1,966,970.70-712,216.20

Finding the Fourth Proportional to 1,312,139.40, 1,966,970.70 and 712,216.20

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Solution

The fourth proportional to 1,312,139.40, 1,966,970.70 and 712,216.20 is: 1,067,652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,139.40 : 1,966,970.70 = 712,216.20 : x
  2. Step 2: Convert to fraction form
    1,312,139.40/1,966,970.70 = 712,216.20/x
  3. Step 3: Cross multiply
    1,312,139.40x = 1,966,970.70 × 712,216.20
  4. Step 4: Simplify right side
    1,312,139.40x = 1,400,908,397,465.34
  5. Step 5: Solve for x
    x = 1,400,908,397,465.34/1,312,139.40
  6. Step 6: Final answer
    x = 1,067,652.11

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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.