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Finding the Fourth Proportional to 520,070.60, 717,776.16 and 305,307.20

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Solution

The fourth proportional to 520,070.60, 717,776.16 and 305,307.20 is: 421,370.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,070.60 : 717,776.16 = 305,307.20 : x
  2. Step 2: Convert to fraction form
    520,070.60/717,776.16 = 305,307.20/x
  3. Step 3: Cross multiply
    520,070.60x = 717,776.16 × 305,307.20
  4. Step 4: Simplify right side
    520,070.60x = 219,142,229,636.35
  5. Step 5: Solve for x
    x = 219,142,229,636.35/520,070.60
  6. Step 6: Final answer
    x = 421,370.16

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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.