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Finding the Fourth Proportional to 666,509.49, 919,779.21 and 360,585

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Solution

The fourth proportional to 666,509.49, 919,779.21 and 360,585 is: 497,605.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,509.49 : 919,779.21 = 360,585 : x
  2. Step 2: Convert to fraction form
    666,509.49/919,779.21 = 360,585/x
  3. Step 3: Cross multiply
    666,509.49x = 919,779.21 × 360,585
  4. Step 4: Simplify right side
    666,509.49x = 331,658,586,437.85
  5. Step 5: Solve for x
    x = 331,658,586,437.85/666,509.49
  6. Step 6: Final answer
    x = 497,605.20

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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.