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Finding the Fourth Proportional to 659,947.20, 989,726.40 and 260,455.20

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Solution

The fourth proportional to 659,947.20, 989,726.40 and 260,455.20 is: 390,606.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,947.20 : 989,726.40 = 260,455.20 : x
  2. Step 2: Convert to fraction form
    659,947.20/989,726.40 = 260,455.20/x
  3. Step 3: Cross multiply
    659,947.20x = 989,726.40 × 260,455.20
  4. Step 4: Simplify right side
    659,947.20x = 257,779,387,457.28
  5. Step 5: Solve for x
    x = 257,779,387,457.28/659,947.20
  6. Step 6: Final answer
    x = 390,606.08

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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.