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Finding the Fourth Proportional to 478,778.76, 660,710.28 and 260,987.40

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Solution

The fourth proportional to 478,778.76, 660,710.28 and 260,987.40 is: 360,160.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,778.76 : 660,710.28 = 260,987.40 : x
  2. Step 2: Convert to fraction form
    478,778.76/660,710.28 = 260,987.40/x
  3. Step 3: Cross multiply
    478,778.76x = 660,710.28 × 260,987.40
  4. Step 4: Simplify right side
    478,778.76x = 172,437,058,130.47
  5. Step 5: Solve for x
    x = 172,437,058,130.47/478,778.76
  6. Step 6: Final answer
    x = 360,160.21

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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.