Home / 578,430.80-869,719.80-487,192.40

Finding the Fourth Proportional to 578,430.80, 869,719.80 and 487,192.40

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Solution

The fourth proportional to 578,430.80, 869,719.80 and 487,192.40 is: 732,535.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,430.80 : 869,719.80 = 487,192.40 : x
  2. Step 2: Convert to fraction form
    578,430.80/869,719.80 = 487,192.40/x
  3. Step 3: Cross multiply
    578,430.80x = 869,719.80 × 487,192.40
  4. Step 4: Simplify right side
    578,430.80x = 423,720,876,689.52
  5. Step 5: Solve for x
    x = 423,720,876,689.52/578,430.80
  6. Step 6: Final answer
    x = 732,535.12

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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.