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Finding the Fourth Proportional to 1,148,445.81, 1,584,946.74 and 665,019.48

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Solution

The fourth proportional to 1,148,445.81, 1,584,946.74 and 665,019.48 is: 917,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148,445.81 : 1,584,946.74 = 665,019.48 : x
  2. Step 2: Convert to fraction form
    1,148,445.81/1,584,946.74 = 665,019.48/x
  3. Step 3: Cross multiply
    1,148,445.81x = 1,584,946.74 × 665,019.48
  4. Step 4: Simplify right side
    1,148,445.81x = 1,054,020,465,299.87
  5. Step 5: Solve for x
    x = 1,054,020,465,299.87/1,148,445.81
  6. Step 6: Final answer
    x = 917,779.89

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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.