Finding the Fourth Proportional to 1,187,989,140.95, 1,639,507,877.39 and 785,403,432.02
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Solution
The fourth proportional to 1,187,989,140.95, 1,639,507,877.39 and 785,403,432.02 is: 1,083,911,518.49
Step by Step Solution
- Step 1: Write the proportion equation
1,187,989,140.95 : 1,639,507,877.39 = 785,403,432.02 : x - Step 2: Convert to fraction form
1,187,989,140.95/1,639,507,877.39 = 785,403,432.02/x - Step 3: Cross multiply
1,187,989,140.95x = 1,639,507,877.39 × 785,403,432.02 - Step 4: Simplify right side
1,187,989,140.95x = 1,287,675,113,722,779,648 - Step 5: Solve for x
x = 1,287,675,113,722,779,648/1,187,989,140.95 - Step 6: Final answer
x = 1,083,911,518.49
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.