Home / 478,621,726.85-660,548,762.64-280,549,638.83

Finding the Fourth Proportional to 478,621,726.85, 660,548,762.64 and 280,549,638.83

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Solution

The fourth proportional to 478,621,726.85, 660,548,762.64 and 280,549,638.83 is: 387,188,266.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,621,726.85 : 660,548,762.64 = 280,549,638.83 : x
  2. Step 2: Convert to fraction form
    478,621,726.85/660,548,762.64 = 280,549,638.83/x
  3. Step 3: Cross multiply
    478,621,726.85x = 660,548,762.64 × 280,549,638.83
  4. Step 4: Simplify right side
    478,621,726.85x = 185,316,716,784,952,640
  5. Step 5: Solve for x
    x = 185,316,716,784,952,640/478,621,726.85
  6. Step 6: Final answer
    x = 387,188,266.62

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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.