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Finding the Fourth Proportional to 405,384.80, 605,108.48 and 357,502.88

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Solution

The fourth proportional to 405,384.80, 605,108.48 and 357,502.88 is: 533,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,384.80 : 605,108.48 = 357,502.88 : x
  2. Step 2: Convert to fraction form
    405,384.80/605,108.48 = 357,502.88/x
  3. Step 3: Cross multiply
    405,384.80x = 605,108.48 × 357,502.88
  4. Step 4: Simplify right side
    405,384.80x = 216,328,024,312.42
  5. Step 5: Solve for x
    x = 216,328,024,312.42/405,384.80
  6. Step 6: Final answer
    x = 533,636.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.